Cv Mat Release

See also read note in c api functions cvretrieveframe and cv retrieveframe return image stored inside the video capturing structure.

Cv mat release.

The mat release is a consumer facing article that focuses on providing useful information rather than brand centric copy like a press release. Classes that create new mat should mat release or memory leaks are created there are methods that create mats as local variables and expect the jvm to gc them when they fall out of scope there s not reference. If you want to release the data pointed by a matrix header before the matrix destructor is called use cv mat release. Cv videocapture release closes video file or capturing device.

The next important thing to learn about the matrix class is element access. It is not allowed to modify or release the image. Void cv mat release decrements the reference counter and deallocates the matrix if needed. The method decrements the reference counter associated with the matrix data.

You can copy the frame using cvcloneimage. The elements are stored in row major order row by. When the reference counter reaches 0 the matrix data is deallocated and the data and the reference counter pointers are set to null s.

This is ok for normal objects but due to mat relying on finalize to clean up resources it will leak memory. Here is how the matrix is stored. With cv mat test it with mat empty.